Petroleum illuminating-oil



UNITED STATES HENRY V.

PATENT OFFICE.

P. DRAPER, OF HANNIBAL, ASSIGNOR OF SEVEN-SIXTEENTHS TO FRANK HOLTZOLAW,OF ST. LOUIS, MISSOURI.

PETROLEUM lLLUMlNATlNG-OIL.

SPECIFICATION forming part of Letters Patent No. 238,867, dated March15, 1881.

Application filed December 8, 1879.

5 ing-Oils, of which the following is a full, clear,

and exact description.

The aim and effect of this improvement are to elevate the temperature atwhich petroleum illuminating-oils give off explosive vapors and 10 toraise what is termed the burning-point of such oils.

It consists in combining chloroform with petroleum illuminating-oils.For instance, as follows: Take, say, five (5) pounds of chloro- 15 formand fifty (50) gallons of oil, and thoroughly mix the two ingredients.The mixing can be effected at any ordinary atmospheric temperature. Theeffect is to raise the temperature at which the oil gives off an explo-2o sive vapor and at which the oil burns in the sense used by coal-oilinspectors in applying the fire-test to coal-oils. I have discoveredthat the effect varies according to the quantity of the chloroform andto the thoroughness of the mixing, the larger the proportion ofchloroform used, up to the point of saturation, and the more intimatelyit is combined with the oil the higher the temperatures at whichexplosive vapors are evolved from the oil and at which the oil burns.

I claim- The herein-described compound, consisting of petroleumilluminating-oil and chloroform, combined in the proportionssubstantially as specified.

H. V. P. DRAPER. Witnesses:

CHAS. D. MooDY, SAML. S. BOYD.

